[texworks] inconsistens because of help-files?

[Christian Buhtz]

v0.4.3.r858 (official)

I am new in \LaTeX{} and because of that I am not sure which
component of the tex-system (TexLive 2011) influcence my
problem. So I start with the front end TeXworks.

If I modify the name of a  \section then in \tableofcontents
is still the old name.

With \ref and \pageref there is often only '??' to see.
Sometimes a second build afect in the correct output.

I need to see everytime(!) a absolute actual and correct
Output without ? or old section names.

How can I do this?